Improvement in reed-pipes for organs



W. A. JOHNSON.

REED-PIPES FOR ORG-ANS.

Patented June 12,1877.

NFHERS. PHOTO-UTHOGRAPHER. WASHINGTON, D10

been constructed of a less diameter at or near base to top, that Iobtain a greatly improved UNITED STATES WILLIAM A. JOHNSON, OFWESTFIELD, MASSACHUSETTS, ASSIGNOB TO JOHNSON & SON, OF SAME PLACE.

IMPROVEMENT IN REED-PIPES FOR ORGANS.

Specification forming part of Letters Patent No. 191,973, dated June 12,1877; application filed May 21, 1877.

To all whom it may concern:

Be it known that I, WILLIAM A. JOHNSON, of Westfield, county of Hampdenand State of Massachusetts, have invented new and useful Improvements inReed Stop Organ- Pipes, which improvement-s are fully set forth in theannexed specification and in the accompanying drawing.

The object of my invention is to produce from reed-pipes greateropenness and souority of tone than has heretofore been possible frompipesof ordinary construction, owing to an undue contraction of theairpassage between the wind-opening under the reed and the top of thetube.

Care has not been taken in the construction of such pipes to leave asufficiently free egress from the eschallot for the sound-wavescreatedby the vibrations of the reed; but, on the contrary, the eschallot, ortube against which the reed is secured. and vibrates, has generally itsjunction with the main tube of the pipe in the block than that at itsbase.

I have found by experiment that by (onstructiug the eschallot of agradually-increasing diameter from its lower end to its junction withthe lower end of the tube in the block, and by having the taper of thetube and eschallot correspond, or very nearly so, from tone, oneentirely free from the usual cramped or confined sound which is producedfrom pipes of the old construction.

In the drawing, A is the tube; B B, the block in two parts. a is theeschallot. c is the reed. c is a wedge. d is the reed-spring; D, thebottom tube. r

Figure 1 is a view in vertical section of my improved reed-pipe.complete. Fig. 2 is an elevation showing the lower half B of the block,with the eschallot a, reed a, and wedge c, as arranged preparatory toattaching B to B by screws.

To the part B of the block may be attached that, by reason of theunobstructed and con- PATENT OFFICE.

a tube of a shape differing somewhat from tube A, for the purpose ofproducing certain other musical effects 5 therefore I do not confinemyself to the employment of my tapering eschallot a, block part B, reeda, and wedge c in combination with a tube so formed.

In constructing my improved pipes I employ a block made in two parts. Tothe upper part B I attach, firmly, the tubeA; into the lower part B, ina suitable opening made therein, I force the eschallot a, inserting andfastening the reed a in the usual manner by the wedge c. The part B Ithen attach to part B by screws, insert the spring d, press the bottomtube 1) onto the block, and the pipe is complete.

By making the block B B in two parts I provide a means of convenientlyremoving the eschallot and reed from the pipe for purposes of repairingor cleaning them.

By reference to Fig. 1 it will be clearly seentinually-increasing-in-size airpassage from the bottom of the eschallotto the top of the tube, there is a perfectly clear space for allowingthe tone-vibrations to produce their greatest possible effects.

What I claim as my invention is- 1. An organ reed-stop pipe, constructedwith a gradually-increasing interior diameter from the bottom of theeschallot a to the top of the tube A, substantially as and for thepurpose set forth.

2. The combination of the bottom tube D, the lower portion B of theblock, the tapering eschallot a, reed a, wedge o, and spring (I,substantially as set forth.

3. The combination of the bottom tube D, spring 61, eschallot a,block-pieces B B, wedge o, reed a, and tube A, substantially as setforth.

WILLIAM A. JOHNSON. Witnesses:

H. A. CHAPIN, W. H. OHAPIN.

